I just bought a rane sm82 on ebay from a teacher who had bought several for a school only to find out they didn't have a separate headphone output which he needed. He was able to sell the ranes at a loss and still have enough money to buy the behringers which he claimed were very quite, with headphone output, and had an I internal power supply which the rane does not. I'm not complaining as from my experience the rane is of excellent sound and build quality,. both units have only one effects loop but it is stereo in and out., though it doesn't allow for people with multiple loopers or effects much flexibility for resampling or processing after loopinging. Another product I have had good luck with as a mini mixer /effects blender is the DTAR solstice preamp. Though it only has a mono effects loop, it does have a separate insert for each of its two channels that can each accept either 1/4 inch or XLR with mic pre, thre band eq and phantom power. The insert points are pre effects loop which would allow for resampling capabilities if using two loopers.
I really like the SM82 though it could use another effects loop, it is very transparant, easily as clean as my mackie 1402vlz.